tls: handle SSL_ERROR_WANT_CERTIFICATE_VERIFY and SSL_ERROR_PENDING_SESSION
tls: handle SSL_ERROR_WANT_CERTIFICATE_VERIFY and SSL_ERROR_PENDING_SESSION

Motivation:

For more advanced use-cases the certificate verification or session lookup may be executed asynchronously.  In this case SSL_ERROR_WANT_CERTIFICATE_VERIFY / SSL_ERROR_PENDING_SESSION will be returned

Modifications:

Add mapping for SSL_ERROR_WANT_CERTIFICATE_VERIFY / SSL_ERROR_PENDING_SESSIO

Result:

Be able to to use asynchronous certificate verification and session lookup
cloudflare/quiche,cloudflare/quiche,cloudflare/quiche